Description : Most of the high voltage transmission lines in India are (a) underground (b) overhead (c) either of the above (d) none of the above
Last Answer : (b) overhead
Description : By which of the following systems electric power may be transmitted ? (a) Overhead system (b) Underground system (c) Both (a) and (b) (d) None of the above
Last Answer : (c) Both (a) and (b)
Description : Overhead system can be designed for operation up to (a) 11 kV (b) 33 kV (c) 66 kV (d) 400 kV
Last Answer : (c) 66 kV
Description : Overhead lines generally use (a) copper conductors (b) all aluminium conductors (c) A.C.S.R. conductors (d) none of these
Last Answer : (c) A.C.S.R. conductors
Description : Which of the following methods is used for laying of underground cables ? (a) Direct laying (b) Draw-in-system (c) Solid system (d) All of the above
Last Answer : (d) All of the above
Description : The underground system cannot be operated above (a) 440 V (b) 11 kV (c) 33 kV (d) 66 kV
Last Answer : (d) 66 kV
Description : The material commonly used for sheaths of underground cables is (a) lead (b) rubber (c) copper (d) iron
Last Answer : (a) lead
Description : Due to which of the following reasons the cables should not be operated too hot ? (a) The oil may loose its viscosity and it may start drawing off from higher levels (b) Expansion of the ... instability may rise due to the rapid increase of dielectric losses with temperature (e) All of the above
Last Answer : (e) All of the above
Description : Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission
Last Answer : (a) Increase of short-circuit current of the system
Description : Which of the following materials is not used for transmission and distribution of electrical power ? (a) Copper (b) Aluminium (c) Steel (d) Tungsten
Last Answer : (d) Tungsten
Description : High voltage transmission lines use (a) suspension insulators (b) pin insulators (c) both (a) and (b) (d) none of the above
Last Answer : (a) suspension insulators
Description : Besides a method of trial and error, which of the following methods is employed for solution of network problems in interconnected system ? (a) Circulating current method (b) Thevenin's theorem (c) Superposition of currents (d) Direct application of Kirehhoffs laws (e) All of the above
Description : Which of the following D.C. distribution system is the simplest and lowest in first cost ? (a) Radial system (b) Ring system (c) Inter-connected system (d) None of the above
Last Answer : (a) Radial system
Description : The minimum clearance between the ground and a 220 kV line is about (a) 4.3 m (b) 5.5 m (c) 7.0 m (d) 10.5 m
Last Answer : (c) 7.0 m
Description : The material generally used for armour of high voltage cables is (a) aluminium (b) steel (c) brass (d) copper
Last Answer : (b) steel
Description : In transmission lines the crossarms are made of (a) copper (b) wood (c) R.C.C. (d) steel
Last Answer : (d) steel
Description : The material commonly used for insulation in high voltage cables is (a) lead (b) paper (c) rubber (d) none of the above
Last Answer : (b) paper
Description : Distribution lines in India generally use (a) wooden poles (b) R.C.C. poles (c) steel towers (d) none of the above
Last Answer : (b) R.C.C. poles
Description : Multicore cables generally use (a) square conductors (b) circular conductors (c) rectangular conductors (d) sector-shaped conductors (e) none of the above
Last Answer : (d) sector-shaped conductors
Description : The distributors for residential areas are (a) single phase (b) three-phase three wire (c) three-phase four wire (d) none of the above
Last Answer : (c) three-phase four wire
Description : The voltage of the single phase supply to residential consumers is (a) 110 V (b) 210 V (c) 230 V (d) 400 V
Last Answer : (c) 230 V
Description : A booster is a (a) series wound generator (b) shunt wound generator (c) synchronous generator (d) none of the above
Last Answer : (a) series wound generator
Description : The operating voltage of extra high tension cables is upto (a) 6.6 kV (b) 11 kV (c) 33 kV (d) 66 kV (e) 132 kV
Description : The operating voltage of supertension cables is up to (a) 3.3 kV (b) 6.6 kV (c) 11 kV (d) 33 kV
Last Answer : (d) 33 kV
Description : The operating voltage of high voltage cables is up to (a)l.lkV (b)3.3kV (c)6.6kV (d)llkV
Last Answer : (d)llkV
Description : The square root of the ratio of line impedance and shunt admittance is called the (a) surge impedance of the line (b) conductance of the line (c) regulation of the line (d) none of the above
Last Answer : (a) surge impedance of the line
Description : The phenomenon qf rise in voltage at the receiving end of the open-circuited or lightly loaded line is called the (a) Seeback effect (b) Ferranti effect (c) Raman effect (d) none of the above
Last Answer : (b) Ferranti effect
Description : 310 km line is considered as (a) a long line (b) a medium line (c) a short line (d) any of the above
Last Answer : (a) a long line
Description : Which of the following are the constants of the transmission lines ? (a) Resistance (b) Inductance (c) Capacitance (d) All of the above
Description : The corona is considerably affected by which of the following ? (a) Size of the conductor (b) Shape of the conductor (c) Surface condition of the conductor (d) All of the above
Description : The usual spans with R.C.C. poles are (a) 40—50 meters (b) 60—100 meters (c) 80—100 meters (d) 300—500 meters
Last Answer : (c) 80—100 meters
Description : Galvanised steel wire is generally used as (a) stay wire (b) earth wire (c) structural components (d) all of the above
Last Answer : (d) all of the above
Description : The wooden poles well impregnated with creosite oil or any preservative compound have life (a) from 2 to 5 years (b) 10 to 15 years (c) 25 to 30 years (d) 60 to 70 years
Last Answer : (c) 25 to 30 years
Description : If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the ... (b) Ohm's law (c) Kirchhoffs law (d) Faraday's law (e) none of the above
Last Answer : (a) Kelvin's law
Description : are the conductors, which connect the consumer's terminals to the distribution (a) Distributors (b) Service mains (c) Feeders (d) None of the above
Last Answer : (b) Service mains
Description : Differentiate between overhead transmission and underground transmission.
Last Answer : Points Overhead line Underground cable Capital cost Less More Erecting cost Less More Time require for completion of work Less More Flexibility More ... Space consumed Space consumed No space consumed Appearance Not good Very good
Description : Why underground service connections are service connections are costly than overhead service connection
Last Answer : Reason: Underground service connection is given by underground cable. This cable is costly than bare conductor. Sometimes cable trench is required for cable laying, which requires additional cost. So underground service connections are costly than overhead service connection.
Description : These TQM initiatives reduce administrative overhead; reduces the R&D cycle time and enhances the effectiveness of the promotion and sales budget. a. Concurrent Engineering (CCE); Channel Support systems ... Inventory d. Channel Support systems and Six Sigma e. Quality Initiative Training (QIT)
Last Answer : b. Quality Function Deployment and Benchmarking
Description : This process management initiative reduces material costs and administrative overhead. a. Benchmarking b. Vendor/Just-in-Time Inventory (JIT) c. Continuous Product Improvement systems (CPI) d. Channel Support systems e. Quality Initiative Training (QIT)
Last Answer : b. Vendor/Just-in-Time Inventory (JIT)
Description : In batch distillation with constant reflux, overhead product composition __________ with time. (A) Increases (B) Decreases (C) Does not vary (D) May increase on decrease, depends on the system
Last Answer : (B) Decreases
Description : With lapse of time, the overhead composition of light component in case of batch distillation with constant reflux (A) Increases (B) Decreases (C) Remain same (D) May increase or decrease; depends on system
Description : Large cable sizes are formed as individual conductors that may be comprised of several smaller strands to __________. A. obtain the flexibility required for easy handling B. reduce the overall weight of the ... . reduce the number of supports needed for a horizontal overhead run D. all of the above
Last Answer : Answer: A
Description : 3. Overhead projector is superior to short circuit TV in a classroom teaching because (a) It is cheap and self devised (6) Pictures in it may be shown in a desired sequence and with a minimum of lost motion (material) (c) Information presented though it is easily retained (d) it is easy to use
Last Answer : (c) Information presented though it is easily retained
Description : Which one of the following statements is correct regarding sexually transmitted diseases (STDs)? (a) A person may contract syphilis by sharing milk with one already suffering from the disease. (b) Haemophilia is ... both STDs. (d) The chances of a 5-years boy contracting a STD are very little.
Last Answer : (d) The chances of a 5-years boy contracting a STD are very little.
Description : By what process is heat transmitted from the filament of an evacuated electric bulb to the glass? (a) Conduction (b) Convection (c) Radiation (d) Heat cannot be transmitted through vacuum
Last Answer : Ans:(c)
Description : The transmission coefficient of a wave with incident and transmitted electric field of 5 and 5 respectively is a) 0 b) 1 c) 10 d) 5
Last Answer : b) 1
Description : Which of the following is/are true concerning electric power operated watertight door systems? A. Each motor driven door must use the main bus as its source of power. B. Each distribution panel for ... to permit quick activation of the system. D. Each system must have a separate branch circuit.
Last Answer : Answer: D
Description : Pick up the correct statement from the following: (A) The precipitation during its travel in atmosphere dissolves certain gases (B) Rain water which percolates through the ground, is free from ... water may dissolve minerals and salts present in the earth's layers (D) All the above
Last Answer : (D) All the above
Description : A pressure conduit laid underground, may not be subjected to (A) Internal pressure of water (B) Pressure due to external load (C) Longitudinal temperature stress (D) Longitudinal stresses due to unbalanced pressure to bends
Last Answer : (C) Longitudinal temperature stress